Can you float her in the tank while she's in her cup or something else? She needs to be kept warm if she's going to get better. With all that damage, she's probably in shock, and it probably hurts to move. If you can't float her in her cup, then make sure your divider is good and secure, and put her back into her side of the tank. I can't stress enough how important it is to keep her warm during her healing process.
If you have aquarium salt, that may help too, but you may have to treat the whole tank since you don't have an extra one. I've never had to use aquarium salt, so I don't know the dosing, but I do know you should only use it for 10 days.